Device for inflating the pneumatic tires of vehicles.



PATBNTED DBG. 25, 1906.

' C. NIELSEN. DEVICE FOR INFLATING THB PNEUMATIG TIRES OF VEHICLE-S.

APPLICATION FILED DEO.14. 1905.

2 SHEETS-SHEET l.

Q" MIL PATENTED DEC425, 1906.

C. NIELSEN. DEVICE FOR INPLATING THE PNBUMATIG TIRES 0F VEHICLES.

APPLIOATIN FILED DBG.14. 1.905.

2 SEEETS--SHEBT 2.

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earnnfr enteren.

CARL NlE-LSEN, F .COPlLNl-lAGEN, DENMARK.

Speccaton of Letters Patent.

Patented Dec. 25, 1906.

Application filed December 14,19%. Serial No. 291,755.

To zal] iff/711m?, 23D' Tita/y concern:

Be it known that I, CARL NinLsnN, 1nanufacturer, residing at Copenhagen, Oerstet svey LU, in the Kingdom or' Denmark, have invented an Improved Device for lntlating the Pneumatic Tires oi' Vehicles, o'l which the following is a specification.

This invention relates to a device for inlating the pneumatic Vtires of vehicles inand the movable parts of the air-pipe presents.

great difficulties. lt has not been vl'ound possible hitherto to effectthis packing in such a manner that air could pass out of the lixed into the movable parts of the air-pipe or inversely without a considerable escape ol air.

By ine-ans ol' the new device which forms the subject of the present invention it is possible for the compressed air to be reliably conveyed without any escape. For this purpose the positions for effecting coupling between the l'ixed and movable parts of the airpipe are provided incertain dolinite parts of the vehicle. The important point is that each coupling-place should be situated on the ends or' the wheel-axles. ln this way it is possible to ar ange the opening ol` tlm one part oi' the pipe in sucha manner that its central point lies in the axis ofthe wheel, so that the other part of the pipe can be lioined up, so :is to form a direct extension of the iirst part. ,ln this way it is possible to' restrict the packing-surfacesto the smallest possible disensions, as their size is dependent only upon the bare width oi', the parts oi" the air-pipe. By polishing the rounded packiiigsurl'aces it is possible to obtain so small a friction that the wheels can run with the greatest rapidity without becoming hot and that they can cndure the strongest shocks. Further, the wear and tear ot the` packings is very small, and they are tightened automatically while wearing and may be renewed easily from abroad.

lu Figures 1 to (5 of the accompanying drawings the invention is illustrated in sev eral forms by vertical sections at a couplingpoint between a fixed and a movable part of the air-pipe. Fig.v 'Z shows the varied form o'll a detail employed in the invention. F ig. 8 is a diagrannnatic plan of the frame of a mo tor-car with the coupling-places arranged according to the present invention. Fig. 9 is a diagram illustrating the manner in which the form of the curvature on the end surfaces of the wlieel-axles is determined.

In the forni of the invention according to Fig. 1, the wheel 1 is looselyseated on the axle 2, so that the axle represents a iixed part. The axle 2 is provided with a' passage 3 for conducting the air, into which the air is conveyed by attaching a hose-pipe or the like to the junction 4. On the end of the axle 2 a pin-like extension 5 is arranged, 'which engages with the cylindrical bore 6 of a sleeve-like part 7. This sleeve-like part 7 has a passage 8, to which the pipe 11, which leads to the pneumatic tire oi the-wheel,- is connected by means of a junction-piece 9 and a hose-pipe piece 10. The sleeve-like part 7 is under the inluence olt a spring 12, which lies against a cross-piece 13, which after the placing of .the nuts 14 on the bolts 15 can be adjusted in such a manner that the pressure ol the spring can be regulated. The described parts are inclosed by a cap or casing 16, which is screwed to a plate, disk, or the like 17. By means ot bolts 18 this disk, plate, or the like 17 is connected with the wheel 1 and rotates therewith. lt will be Seen that in this torni ol the invention the iixed p irt of the air-pipe is formed by the wheel-axle 2 and the movable partot the air-pipe by the parts 7, 9, 10, and 11. The object now is to eilect an air-tight packing between these partswthat is to say, at the place where the air passes out of the passage S in the sleeve-like part 7 'into the passage 3 in the axle 12. For this purpose packing niaterial 21. is provided between the end 19 of the axle 2 and the "bottoni 20 of the cylindrical boring 6 in the sleeve-like part 7. .lt will be observed that the packing-surfa -es 1Q and 2() may be made very small, because the passages 8 and 3 pass directly one into the other and becuase the central point of the opening of the passage 8, lying against the axle Zhis situated in the axis of the wheel 1 or in the central line of the wheel-axle 2. The surfaces 1S) and 20, as will be seen, are suitably curved spherically in order that permeability may be avoided when the vc- IOO 3o like 17.

4o passing-out between of any" preferred 'material is placed between the disk 17 andthe sleeve,

5 sible, the pin-like extension 5 of the axle 2 has play in the cylindrical passage 6 of thev sleeve 7 and the latter has play in a cylindrical hub 22 in the plate 17. In the annular 'space 23, which is limited, on the one hand, by

1o the plate 17 and, on the other hand, by the sleeve 7, lubricating material or 'the like can be introduced. It is not necessaryv that the pin-like extension 5 of the axle 2 should form a part of the axle. It may,as shown 1n Fig.

i5 7, be specially arranged on the axle being screwed thereto.

inthe Jform of the invention shown in Fig. 2 a special device is'v shown, the objector ,which is that whenA the pressure of the spring 12 is adjusted the pressure existing-in the interior or" the air-pipe, which in most cases is very great, may not be overcome. In `this device there is no direct connection between the pipe 11, .which conveys-.the compressed `25 air to the pneumatic tire, and the passage 8 in the sleeve-like part 7 but @the connection between these parts is formed by a chamber 24, which is impermeably closed on 'the outside and screwed to the plate, disk., or the The sleeve-like part 7 is thusinternally as Well as externally under the pressure of the compressed air, so that equilibrium is completely established. By means of the spring 12 it is only necessary to apply such a pressure as is requisite fordnaki-ng the surfaces 19 and 2O come tightly together. For the guiding of the sleeve-like-part 7 pins 25 are provided, which enter suitable openings in the plate 17. In order to prevent air from the disk 17 and the axle,

a packing-ring 26 For the purpose of rendering the chamber v24 air-tight a layer of packing 2S may 4 5 provided under lthe ange of the cap 27 l v It will be seen that in this form of the .invention also the coupling-place between the movable part 7 and the fixedpart 2 ofthe air-pipe lies at the end of the axle 2,` andthe packing beling places may,

the inner ends of the axles. This form is sleeves 7, which can rotate on the inner ends vof the axles 2. Substantially the special form of this device agrees with the form illustrated in Fig. 1. sleeves 7 against the ends of the axles in this case, however, flat springs. 34 are employed, one end of the spring being ixed to the carriage-rame and the other and Jfree end pressing against the sleeve 7. For adjusting the pressure of the springs 34 a winged nut 35 is Aemployed, which passes through both iat springs 34. In this form of the invention, as in' that previously described, the packing-surface between the movable 'part 2er the airconduit and the fixed part 7 is reduced to the against one another by their ends,

By the form illustrated in Fig. 5 it is shown that it isnot necessary to-employtthe'axle as an air-conduit. In such a case the hose-pipe 10., through which the compressed air is conveyed to the pneumatic tire, may join onto a special coupling-piece 36, which is rigidly connected .with the wheel 1 by :screws 37 or in othereeuivalent way in such la manner that it participatesin the rotation of' the wheel and that thereby its passage 36 forms apart of lthe movable part of thea-ir-condilit. The `coupling part 36 may be seated by its end 39 `-n a bearing 40, rigidly connected with the carriage-frame. This bearing 40 can then 'also serve for iixing the cap 16, which, for exampl .other manner. In this cap 16 the part 7,

particularly suitable in connection with the front-wheel axle, which is generally divided.

pipe 33, leading to the air-pump, and the.

as shown, be situated on For pressing the' smallest dimensions,pas these two parts come, l

IOO

IIO

e, is effected by screws 41 or in any 60 layer of packing 31 is provided, which is laid furnished with the passage 8, is then arranged. The part 7 is under the influence of the spring 12 and has the pipe 42 attached to it, which is joined up to the air-pump.l It will thus be seen that it is also possible without employing the axle to arrange Athe coupling-pointsbetween the fixed parts 427 and the movable parts 36 10 of the air-conduit on the end of the axle. In this case also the packing between the surfaces rotating against each othercanbe reduced to the smallest possible dimensions as the middle point of the opening 43, through `which the compressed air passes into the movablepart, liesin the axis of the movable part. Here also the packing material 21 is provided between 5 0 tween these' parts of the pipe is restricted te the least possible dimensions. Y

The form of thev invention according to Fig. 3 is carried out in a similar manner as that in Fig.l 2-. The adjustment of the pressing- 55 spring 12 is effected in this case not by the adjustment of the closing-cap 27 of the chamber 24, but by aspecial bent piece 29, which can be moved by means of winged nuts 30. In this form of the invention, moreover,v a

round the pin 5 ofthe axle 2.

Fig. 4 shows that it is not necessary that thecoupling-places between the xed and the `movable parts should be situated at the 65 outer ends of the wheel-axles, as the coupthe end of a pin-like extension 5 and the bottom of a cylindrical opening 6, ln this form of the invention also the annular space 23 may be employed for receiving lubricating ma! terial.

In the form illustrated in Fig. 6 the wheel l is iirmly keyed to the axle 2, so that in this case also the axle 2, with its passage 3, forms a movable partot the air-conduit. The pipe 44, leading to the pneumatic wheel-tire, opens in this case into a chamber 45, which is made air-tight on the outside and is fixed on a bearing 4jnovided in the 'frame el() of the vehicle by means ol" screws 47 or the like, with an intermediate layer of pz'icking 4:6. The passage 3 .in the axle runs into the hollow space -Ll-S in a sleeve 4), in which a passage 5() is provided, through which the compressed air can pass out of the hollow space in the chamber 45 by means of the hollow space 4:8 into the passage 3 ot the axle 2 and thence into the air-conduit. The sleeve #i9 is under the influence of a spring 51, by which it is pressed toward the end of the axle 2. The layer of packing 3i is in this case,` as in the form according to Fig, 3, laid round the external surface ol: the/pin-like extension 5 of the axle 2. ln this torni, moreover, as in the forms shown in Figs. 2 and 3,7only a rolas, tively small expenditure of power is necessary Jfor tightening the packing Bln-that is, lier adjusting the sleeve 49-as in consequence ot its being arrangediin a space which is under the pressure ol" the compressed air the sleeve L9 is entirely in equilibrium.

ln the diagramn'iatic plan of a vehicle trame illustrated in llig. S, a represents the coupling-points between the lixed parts?) and the movable parts c of the airconduit. the air-pump. which is connected by a pipe c with an air vessel f, to which a device f/ is joined, b v means of which the air-pump 'i is set in action automatically through the medium of the device 7i when the pressure in the pneumatic tires i falls-that is to say, when there is a reduction of pressure in the air vessel f. The pump (l is put out ot action immediately the pressure in the tires is as great as desired. For this purpose a device may be employed similar to that claimed and described in United States Patent No. 722,656. This automatic starting and stopping of the air-pump can oi course be dispensed with. In the drawings the arrows indicate the direction in which thecompres'sexl air flows through the conduit.

The object oli the invention, as will be seen trom the foregoing, is of course independent ot the special form ol its (,li'llierent parts. lhe connection between the fixed and the movable parts of the air-conduit may be effected alike with the assistance oic other constructional parts and with the employment of intermediate parts constructed as may be' desired. lt is only necessary that the coupling-places should be situated on a positivelydetermined part 'ot the vehicle-viz., at one end of the axle. ln connection herewith it is a matter of indil'l'erence whether they are situated at an end which is outside the wheels or one that is between the wheels. The principle underlying the present invention can, moreover, be applied to other purposes when it is necessary to produce an airight coupling between a vlixed and a rotary part with surfaces as small as possible moving one against the other.

What l claim as my iuventim, and desire to secure by Letters lPatent, is-

1,. A device 'for inllating pneumatic tires ol vehicles with coupling parts situated at the end of the axle for coni'iecting the lixed and movable parts ol the air-conduit, a packing arranged' between the meeting faces of both parts, and springs for pressing both parts of the air-conduit against each other and the packing between them,

2. ln a device for inllating the pneumatic tires of vehicles coupling parts at the end of the axle in alincment with one another, a layer ol: packing placed between their meeting ends and a spring for pressing one oi the parts and theI packing agi'tinst the other part.

ln a device for `inllating' the pneumatic tires of vehicles coupling parts at the end of the axle in alinement with one another, one of the parts being provided with a pin-like extension and the other with a cylindrical passage, a. layer ot packing being placed between their meeting ends and adjustable springs lor pressing both parts against each other and 'lor compressing the packing layer between them.

+L. ln adevicelor inllating the pneumatic tires of vehicles coupling parts at the end ol' the axle telcscoping with one another, one of the parts being provided with a pin-like extension and the other with a cylindrical passage, both parts working loose against each other in the vertical direction, a layer of packing between their meeting ends and a spring for pressing them and the packing together at the coupling-places,

ln a device for iuflating the pneumatic tires ol' vehicles, a special coupling part arraa'iged in 'lroiit olt the end el'A the axle 'l'or leading the air Vl'rom the fixed to the movable parts ol' the air-couduit, a spring j'nessing against this coupling part, one part o'l the airafonduit being rigidly connected with this coupling part, the rther part ol'. the air-conduit being rotatively seated against it.

o. ln a device lor inllating the pneumatic tires oll vehicles, a chamber closed air-tight against the outside being arrangec'l at the end of the axle ot the wheel, one part ol' the airconduit branching olll from this chamber, a coupling part being arranged in it, a spring in they chamber pressing against the coupling parts, a packing layer between the IOO coupling parts, the spring-actuated coupl Y D the chamber.

ling part being eased by the air-pressure of gether by springs at the ends of the wheelaxles, one of them being fixed and the other l being movable7 the surfaces of both parts being curved in spherical form and a packing between their meeting ends.

8. In a device for inflating the pneumatic tires, an automatic air-pump, driven from the source of power, an automatic device, actuated by the air-pressure, for connecting and disconnecting the pump witha source of power, an air-conduit for leading the air to the tires, coupling parts between the xed andl the movable parts of the conduit, situ ated at the ends of the axles and pressed against ea'ch other by springs. y

9. In an air-conduit the combination of a coupling device arranged at the end of an axle and comprising a fixed member, a movable member disposed in alinement there- 25 able member disposed in alinement therewith, a packing arranged between the meeting ends of said members, and spring means for pressing said fixed and movable members in the direction of their length to tighten the packing between them.

In witness whereof I subscribe my signature in presence of two witnesses,

CARL NIELSEN,

-Witnessesi OLDEMAR HAUPT, HENRY HAsPER, 

